11. Tu quoque
To be fair, this is something that, especially since the left began to claim the moral high ground in arguments, the right has been using equally as often as the left, but it should be noted that while the right has used it for just a few short years, the left has been using it for decades. Tu quoque is the appeal to hypocrisy fallacy ― also known as whataboutism, it's when someone is attacked personally for acting inconsistent with a judgment, and is thus, like poisoning the well, a specific variation of ad hominem. While it does indeed add a hypocrisy element on top of some evil and is therefore two evils on top of one another, hypocrisy is not a debunker. A perfect example of left-wing use of tu quoque is the Left's most commonly used argument about Supreme Court nominee Neil Gorsuch: they assume that Republican obstruction of Obama's nominee, Merrick Garland, back in 2016 justifies their obstruction of Gorsuch. News flash: Because A, the Dems were the first ones to use that argument with regard to SCOTUS nominees in the final year by Reagan and by Bush 43, and B, the entire argument is a fallacy, no it doesn't.
12. False equivalence
When equating something or someone with something or someone else, factors like order of magnitude in the case of something or political positions in the case of someone always matter. Failure to take into account every single detail of every single thing that you equate is called false equivalence. An example of this is when you equate something like the Deepwater Horizon oil spill with a small leak in a car's oil tank. While they both are examples of uncontrolled release of oil, one clearly releases more oil than the other. What, meanwhile, is a political example of this fallacy? That's right, the Trump vs. Hitler comparisons that the left makes. Why? Because fascism is for big government, while Trump, with the glaring exception of building the wall, is for small government. Fascism is for abortion (Harvest of Hate pp. 273-274) while the Trump administration, along with Trump since 2011, is against abortion. Fascism is for increasing welfare; Trump is for a decrease in dependence on welfare. Fascism is for economic tyranny; Trump is for economic freedom. Failure to take all of these factors into account is, yes, false equivalence.
13. Historian's fallacy
When examining past events, always, always make sure to examine them assuming an attitude toward them that is similar to the general population at that specific time period. Failure to do this ― and instead assuming that a person of the past had the same perspective as the modern analyst ― is called the historian's fallacy. An example of this is when people are quick to call fascism right-wing. According to modern standards (which were mostly a result of partisan blame-shifting), it is to a degree (particularly on only one social issue ― homosexuality ― but nothing else), but according to the standards of the early 20th Century, it was as left-wing of a policy as you could get. While Hitler couldn't care less about anyone but himself, Mussolini and FDR, especially in the early 1930s, mutually admired each other ― Mussolini called FDR "one of us" as he read a book by FDR, a book in which he specifically cited Italian fascism as the model on which to base American progressivism. Failure to examine history in the same light as contemporaries examined it makes you doomed to repeat it.
14. Slippery slope
If there is any fallacy that serves as the sole justification for nearly all the evil that the left commits ― the riots, the vandalism, the assault, and in some cases, even murder ― it's this fallacy. Groups like ANTIFA base all of their violence on the assumption, in turn based on previous fallacies on this list, that Trump will someday use government force on them. When someone inherently assumes that the path Trump is taking this country on is a bad one with no proof, that's called the slippery slope fallacy. It is in a way related to the hasty generalization ― it's a hasty generalization of future events, based on a small sample of current events.
15. Appeal to emotion
Ah, here we come to the mother of all left-wing fallacies. An appeal to emotion is when someone disregards facts or statistics and assumes that people might get hurt feelings, which therefore must have priority. Oh, wait, you didn't know that was a fallacy, did you? Well, it is. When people put feelings above facts in political debate, they are creating a political environment that stifles agendas for the sake of not "offending" people. Use of this fallacy creates an environment in which no one can get anything done. It creates a political environment in which all politicians dwell on the minutiae while neglecting the weightier matters of the law that they were voted in to enforce. Such is the environment that, thankfully, now-President Trump is destroying, replacing it with one that once again puts logic, reason, and (as agreed by both conservatives and leftists) facts above baseless emotions. This return to placing reason and logic above baseless emotions is exactly what "Making America Great Again" is all about.